Re: "You have no evidence that Khan has a china chin..."
Khan's chin might not be total china but just shaky as he wasn't out cold and was ok as soon as he got back up to complain to the ref saying It was a push.
Khan's defence needs work though, he won that on pure handspeed. If his defence Improved he can protect his chin enough to be sucessful.
The hype around him Is cheesy though but that happens with Olympians.